Perpetual calendar.



G.V.HOUSE.

PERPETUAL CALENDAR.

APPLICATION FILED SEPT- 10. ISIS- Patent-ed May 9,1916.

2 SHEETS-SHEET l.

mvmron George 1/. #0116 6 By ATTORNEYS G. V. HOUSE.

PERPETUAL CALENDAR.

APPLICATION FILED SEPT. I0, 1915.

1,182,683. Patented May 9,1916.

2 SHEETSSHEET 2.

George M fiaua e A HORNE)? a t me.

Specification of Letters Patent.

GEORGE V. HOUSE OF MOUNT VERNON, NEW YORK.

PERPETUAL CALENDAR.

Patented May 9, 1916.

Application filed September 10, 1915. Serial No. 49,892.

To all whom it may concern Be it known that I, GEORGE V. House, a citizen of the United States, and a resident of Mount Vernon, in the county of West chester and State of New York, have invented a new and Improved Perpetual Calendar, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved perpetual calendar arranged to permit the user to set it for a whole month of any year in any century under both the Julian and Gregorian systems, displaying the name of the month, the number of days in the month and the names of the week days, and when set for any one month of a year the calendar can be readily adjusted for any other month of that year.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a front elevation of the perpetual calendar; Fig. 2 is a rear face view of the same with the supporting brace omitted; Fig. 3 is a cross section of the same on the line 3-3 of Fig. 2; Fig. 4 is a face View of the month indicating member; Fig. 5 is a face view of the week day indicating member; Fig. 6 is an inverted sectional plan view of part of the calendar, the section being on the line 6-6 of Fig. 2; and Fig. 7 is a side elevation of the calendar provided with a supporting brace.

The perpetual calendar is mounted on a dial plate or support 10, preferably provided with a brace 11 for supporting the calendar on a desk, table or the like, as shown in Fig. 7. The support consists of a front 12, a back 13 and a marginal spacing member 1 1 intermediate the front 12 and the back 13. The front 12 is provided with front columns 15 containing consecutive numerals from 1 to 28 for indicating the corresponding days of a month. The front 12 is provided directly above the columns 15 with a segmental opening 16, and the lower portion of the front is provided with a small opening 17. The said front 12 is also provided with three openings 18 at the lower ends of the first three columns 15. On the front 12 is held a central pivot 19 on which are mounted to turn independently one of the other three superimposed disks 20 21 and 22, of which the front disk 20 (see Fig. 1) is provided at its front face and near the margin thereof with the names 23 of the month of an ordinary year together with the names 2 1 of the months of January and February for a leap year. The names 23 or 24L of the month are adapted to be displayed in the openings 17 of the front 12, as indicated in Fig. 1. The face of the front disk 20 is also provided with rows 25 of numerals, of which sundry of the rows contain the numerals 29, 30, 31 and other rows contain only the numerals 29 and 30, but said numerals are adapted to appear in the apertures 18 of the front 12, as plainly shown in Fig. 1, to indicate the days for any one month in conjunction with the numerals in the columns 15. The face of the disk 20 is provided with a circle containing the numerals 29 indicating the last day in February of a leap year. The intermediate disk 21 is provided with three sets of sym bols 27 arranged in a circle and each set indicating the names of the days of a week, the said names being adapted to appear in the opening 16, as shown in Fig. 1.

The rear disk 22 is provided on its rear face with columns 28 containing the numbers of the years in a century, and the said rear face of the rear disk 22 is also provided with a segmental row of numerals 29 indicating nineteen, eighteen, seventeen and sixteen hundreds of years of the Gregorian calendar. Adjacent this row of numerals 29 are two columns of index numerals 30 and 31 for the centuries of the old style and the new style, respectively. The numerals 28, 29, 30 and 31 on the rear face of the rear disk 22 are visible through an opening 32 formed in the back 13 of the support 10.

On the front disk 20 is secured a pin 33 which extends through a segmental slot 3l in the disk 21 and through a segmental slot 35 in the rear disk 22. The rear end of the pin 33 is attached to the short end of an arm 36 mounted to swing loosely on the central pivot 19 and the said arm 36 is provided with a forwardly extending prong adapted to engage one of a series of recesses 38 formed in the rear face of the rear disk 22 and which recesses-38 are arranged in conjunction with the several columns 28 containing the numbers of the years in a century, as will be readily understood by reference to Fig. 2. The arm 36 extends onto the rear face of the back 13 and is adapted to indicate on the names 39 of the month of a year and also on the names 40 of the months of January and February for leap years, as will be readily understood by reference to Fig. 2. when the prong 37 engages the recess 38 and the arm 36 is turned then the front disk 20 rotates in unison with the rear disk 22. The

arm 36 is sufficiently flexible to permit of disengaging the prong 37 from its corresponding recess 38 to allow of turning the front and rear disks 20 and 22, one relatively to the other according to the year of the century for which the calendar is to be set, Thus for the year fifteen in any century the prong 37 is engaged with the recess 38, as shown in Fig. 2, and which recess pertains to the outermost column 28 containing the numeral 15.

The intermediate disk 21 relatively to the rear disk 22 to turn with the same, the intermediate disk back with a flexible arm 41 extending through a marginal cut-out portion 42 formed in the rear disk 22 to extend over the latter, as plainly indicated in Figs. 2 and 6. The arm 41 is provided with a transverse prong 43 adapted to engage one of a series of recesses 44 formed in the rear face of the rear disk 22 opposite the numerals of the columns 29, 30 and 31. On disengaging the prong 43 from a recess 44 the disk 21 is adjustable and for this purpose 21 is provided at its can be turned independently of the disk 22' to set the calendar for any century by re= engaging the prong 43 with a corresponding recess 44. The row of numerals 30 and 31 placed opposite the recesses 44 indicate the proper recess to be used in setting the calendar for any given century of the Grego rian or the Julian system. The row of mimerals indicate centuries of the Gregorian calendar in which the century number of a year or first two digits of the century are respectively 19, 18, 17 and 16 and are placed here for convenience of quick reckoning. In order to find. any other century than the ones given at 30, divide the desired century number by 4' for the Gregorian year and by 7 for the Julian year: The remainder in the one case will be 1, 2, 3 or 0, and in the other case 1, 2, 3, 4, 5, 6 or 0. The arm 41 is then set on the corresponding numeral 1, 2, 3, or O of the column 30' or to the numeral l, 2, 3, 4, 5, 6 or of the column 31, according to whether the desired century is according to the old style style.

The perpetual calendar, as shown in the drawings, is set for the month of August of any year indicated in the first column 28 in the th century of the Gregorian calendar as the arm 41 engages with its prong 43 the recess 44 opposite the numeral 19 iathe century column 29. When it is desired to It will be noticed that and is adapted or the new change for any other century, the arm 41 is disengaged from the disk 22 and the arm is "moved while the disk 22 may be turned in the reverse direction or held stationary until the arm '41 is opposite the corresponding century at the columns 29, and 31. The calendar is then set for this century, and in order to set a calendar for any year in this century the arm 36 is moved to engage the prong 37 with a recess 38 leading to the column 28 containing the numeral corresponding to this particular year of the century, and then the arm 36 is turned to the name of the month 39 on the rear face of the back 13 of the support. In order to set the calendar for the months of January and February in a leap year, the arm 36 has to be turned to register with the leap year marks 40 for January and February,- as indicated in Fig.2. hen it is desired to set the calendar for the year 2015', the user proceeds as follows: The century number or the two first digits of the year 2015 is 20 and this number divided by 4 gives a remainder 0. The arm 41 is moye'd to the numeral 0 (N. S.) on column 31, and its prong 43 is engaged with the recess 44 opposite the numeral 0. The arm 36 is then disengaged from the disk 22 and moved to the recess 38 at the first; column 28 containing the numeral 15, that is, the number of the year in the century above given; The calendar is now set for the Gregorian year2015 and can be readily set for each month of this year by moving the arm 36 into register with the corresponding name 39 of that particular month. To set the calendar for years of the Julian calendar, the century number is divided by 7 and any remainder will be 1, 2, 3, 4, 5, 6 or 0. Thus if the user desires to setthe calendar for the year 1492 (O1 the century number is 14 and this divided by 7 gives the remainder 0. The arm 41 is moved and engaged with the recess 44 op-- posite the numerals 0 in the column 36,- and then the arm 36 is disengaged from the disk 22 and turned until; its prong 37 drops into the recess 38 pertaining to the last column 28 and which column contains the numeral 92 (see Fig. 2). The calendar is now set for the Julian year 1492, and for any particular 7 month the arm 36 1s moved as above described. The number 92 of the last column 28 being in a circle or printed red indicates that it is leap year and consequently for the months of January and February the arm 36 has to be turned to the marks 40'. r p

The rear disk 22 is preferably provided with a short handle or knob 45 to enablethe operator to conveniently set the ca lendar'as above described.

The names 39 and 40 of the months of a year are placed on the back of the back plate- 13 only for convenience of quick adjustment of the arm 36 and are not absolutely necessary for the practical working of the calendar as the names 23 of the months are displayed successively in the opening 17 on turning the disk 20 when imparting a swinging motion to the arm 36 as previouslyexplained.

Having thus described my invention, 1 claim as new and desire to secure by Letters Patent:

1. A perpetual calendar, comprising a dial plate provided on its face with numbers arranged in seven columns, the said dial plate being provided with apertures at one end of sundry of the columns, a cooperating week-day indicating member movable on the said dial plate and provided with symbols indicating the names of the days of the week and adapted to register with the said columns, and a cooperating month-indicating member concentric with the said week-day indicating member and adjustable thereon, the said month indicating member being provided with the names of the months and with sets of numerals 29, 30 and 31, the said week-day indicating member and the said month-indicating member being adapted to move in unison with each other to display the days of the week, the name of the month and the days of the month above 28 if any at the abovementioned apertures.

2. A perpetual calendar, comprising a dial plate provided on its face with numbers arranged in seven columns, the said dial plate or support being provided with an aperture at one end of the columns and apertures at the other end of sundry of the said columns, said dial plate or support having also a month display opening, a mov able year and century member on the said dial plate or support and provided with numbers to designate the years of a century, a cooperating week day indicating member adjustable relatively to the said year and century member and normally locked there to, the week day indicating member being provided with symbols indicating the names of the days of the week and adapted to reg ister with the said columns, and a cooperating month indicating member provided with the names of the months and with sets of numerals 29, 30 and 31, the said month indicating member being adjustable relatively to the said year and century indicating member and normally locked there to, the said week day indicating member and the said month indicating member moving in unison with the said year and century indicating member so as to display the days of the week, the name of the month and the days of the month above 28, if any, at the above mentioned apertures, and a month display opening in the dial plate or support.

3. A perpetual calendar, comprising a support provided on its face with numbers arranged in seven columns, a movable year and century indicating member on the said support and provided with numbers that designate the years of a century, a cooperating week day indicating member adjustable relatively to the said year and century member and normally locked thereto, the week day indicating member being provided with symbols indicating the names of the days of the week and adapted to register with the said columns, and a cooperating month indicating member provided with the names of the months and with sets of numerals 29, 30 and 81, the said month indicating member being adjustable relatively to the said year and century indicating member and normally locked thereto, the said week day indicating member and the said month indicating member moving in unisonwith the said year and century indicating member.

4. A perpetual calendar, comprising a support provided on its face with the numbers from 1 to 28 arranged in seven columns, the said supporting member being provided above the columns with a segmental opening and with apertures at the bottom of first three columns, the said support also having a month display opening, a pivot held centrally on the said support, three superimposed disks mounted to turn on the said pivot independent one of the other, the rear disk being provided with a row of numerals indicating centuries and with numerals arranged in columns indicating the years of a century, the said rear disk having a segmental slot, the front disk being provided with the names of the months arranged in a circle and adapted to be displayed singly in the said month display opening of the support, and the said front disk also having sets of numerals 29, 30 and 31 adapted to be displayed in the said apertures of the columns, the intermediate disk being provided with symbols indicating the names of the week days and arranged in a circle and adapted to be displayed in the said segmental opening of the support to register with the said columns, the said intermediate disk being provided with a segmental slot in register with the said segmental slot in the rear disk, a pin held on the said front disk and extending through the said registering segmental slots,

dicatingmember movable on the said dial plate and provided with symbols indicating the days of the Week and adapted to register with the said columns, a year indicating member normally movable with the said Week-day indicating member and provided with numbers designating years in a century, and a co'ofperating month indicating member concentric With said Week-day indicating member and provided with the names of the months and With sets of numerals 29, 30, 31 adapted to register with the columns of number-son the dial plate to complete the number of daysin the month above 28, if any, the said month indicating member being adjustable relatively to the said Week-day and the yearindicatingmeinbers and normally locked to and moving in unison With them.

In testimony whereof I have signed my. name to this specification in the presence of two subscribing Witnesses.

I GEORGE V. HOUSE. l/Vitnesses THEO. G. Hos'rnn, PHILIP D. ROLLHAUS.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner ot l teii t s,

Washington, D. G." i 

